CN101382586A - Measuring set and method for degree of orientation of ring axial charging permanent magnet - Google Patents
Measuring set and method for degree of orientation of ring axial charging permanent magnet Download PDFInfo
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- CN101382586A CN101382586A CNA2008102248557A CN200810224855A CN101382586A CN 101382586 A CN101382586 A CN 101382586A CN A2008102248557 A CNA2008102248557 A CN A2008102248557A CN 200810224855 A CN200810224855 A CN 200810224855A CN 101382586 A CN101382586 A CN 101382586A
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Abstract
A measuring device for the orientation degree of an annular axial direction magnetizing permanent-magnet, which is characterized by comprising a Helmholtz coil connected with a multimeter in series, wherein, the input/output end of the multimeter is connected with a capacitor in parallel; a rotary table with a drive rod thereof vertical to the rotary table and arranged at the geometric centre of the Helmholtz coil, the rotary table is driven to rotate by a drive motor; and a frock clamping apparatus which is provided with a part for fixing the annular axial direction magnetizing permanent-magnet at the center of the upper surface of the rotary table and the geometric centre of the Helmholtz coil vertical to the rotary table direction. The invention can fast, simply and legibly carry out precise detection to the orientation degree of the annular axial direction magnetizing permanent-magnet so as to guarantee the quality of the products.
Description
Technical field
The present invention relates to the degree of orientation measurement mechanism and the method for ring axial charging permanent magnet, more particularly, the present invention relates to experience the degree of orientation measurement mechanism and the measuring method in the toroidal Sintered NdFeB magnet finished product stage of axial charging.
Background technology
The ring axial charging Sintered NdFeB magnet is to weigh the important indicator of product quality quality in the degree of orientation in finished product stage.
Yet, when the magnetic die mould is orientated, when doing mach square " round as a ball ", when doing the section of cylinder blank, the cylinder blank draw the hole time, all may the degree of orientation in final ring axial charging Sintered NdFeB magnet finished product stage be impacted.
For this reason, can be fast, simply, the degree of orientation to the ring axial charging Sintered NdFeB magnet finished product stage detects exactly legibly, to guarantee the quality of product, just seems particularly important.
Summary of the invention
The degree of orientation measurement mechanism that the purpose of this invention is to provide a kind of ring axial charging permanent magnet, it can be fast, simply, the degree of orientation to the ring axial charging Sintered NdFeB magnet finished product stage detects exactly legibly, to guarantee the quality of product.
Another object of the present invention provides a kind of degree of orientation measuring method of ring axial charging permanent magnet, it can be fast, simply, the degree of orientation to the ring axial charging Sintered NdFeB magnet finished product stage detects exactly legibly, to guarantee the quality of product.
For this reason, according to an aspect of the present invention, provide a kind of degree of orientation measurement mechanism of ring axial charging permanent magnet, it is characterized in that it comprises: Helmholtz coils, it is connected with a multimeter, the input/output terminal of this a multimeter capacitor in parallel; One rotating disk, the drive link of this rotating disk be perpendicular to this rotating disk, and be positioned on the geometric center position of this Helmholtz coils, by the drive motor driven in rotation; And the frock jig, it has the ring axial charging Sintered NdFeB magnet is fixed on the middle position of upper surface of this rotating disk and the Helmholtz coils position perpendicular to the geometric center position of this rotating disk direction.
Preferably, described Helmholtz coils vertically is provided with, and described rotating disk is horizontally disposed with.
Preferably, also comprise heat abstractor.
Preferably, the degree of orientation measurement mechanism of described ring axial charging permanent magnet further comprises A/D converter, computing machine and external unit thereof.
According to another aspect of the present invention, a kind of degree of orientation measuring method of ring axial charging permanent magnet is provided, has it is characterized in that, comprised the following steps: to be provided with Helmholtz coils, it is connected with a multimeter, the input/output terminal of this a multimeter capacitor in parallel; One rotating disk is set, and the drive link that makes this rotating disk is perpendicular to this rotating disk, and is positioned on the geometric center position of this Helmholtz coils; Utilize the frock jig ring axial charging Sintered NdFeB magnet to be fixed on the middle position of upper surface of this rotating disk and Helmholtz coils geometric center position perpendicular to this rotating disk direction; Open drive motor, make this rotating disk drive the rotation of ring axial charging Sintered NdFeB magnet; After treating the rotation of ring magnet constant speed, write down or gather the inductive voltage value of this Helmholtz coils; And the degree of orientation that calculates the toroidal axial charging Sintered NdFeB magnet finished product stage according to inductive voltage value.
Preferably, the degree of orientation of ring axial charging permanent magnet is represented by direction and the turning axle deviation in driction angle [alpha] of magnetic moment m, conversion formula between this angle [alpha] and the inductive voltage value Ueff is: α=k*Ueff/0.01234*m* ω, and wherein, k is a coil constant; ω is an angular velocity; M is total magnetic moment.
Preferably, described inductive voltage value is with the displayed value record of multimeter.
Preferably, described Helmholtz coils vertically is provided with, and described rotating disk is horizontally disposed with.
Preferably, heat abstractor also is set.
Preferably, gather inductive voltage value and finish by computing machine according to the step that inductive voltage value calculates the degree of orientation in toroidal axial charging Sintered NdFeB magnet finished product stage.
According to the present invention, the degree of orientation measurement mechanism and the method for ring axial charging permanent magnet, automaticity is higher, therefore, can be fast, simply, the degree of orientation to the ring axial charging Sintered NdFeB magnet finished product stage detects exactly legibly, to guarantee the quality of product.
Description of drawings
Fig. 1 is the structural principle synoptic diagram according to the degree of orientation measurement mechanism of ring axial charging permanent magnet of the present invention.
Embodiment
As shown in Figure 1, in order to realize the present invention, the frock jig 13 that at first is ready to and needs survey ring axial charging Sintered NdFeB magnet 100 to match, this jig 13 is fixed on the rotating disk 11 of the drive link 10 that links with the rotary engine (not shown), simultaneously, make tested Sintered NdFeB magnet 100 be placed on the Helmholtz coils geometric center position.
Helmholtz coils 12,12 is placed steadily, got a multimeter 15 and connect, at the input/output terminal of this multimeter 15 capacitor 16 in parallel, to prevent the indicating value distortion with this Helmholtz coils 12,12.
Ring axial charging Sintered NdFeB magnet 100 is fastened in the frock jig 13 that matches with the rotating disk 11 of drive link 10, opens engine, make drive link 10 rotations.
If the axial charging direction ideal of round ring magnet 100, the direction of orientation that magnetizes of detected sample should be consistent with the turning axle direction, and perpendicular with the axis direction of coil 12,12.
On the contrary, if the axial charging direction of round ring magnet 100 is undesirable, there are deviation angle in the ring magnet magnetic moment direction and the turning axle direction of axial charging, when the Sintered NdFeB magnet 100 of annular rotates, because magnetic moment direction vector m is not exclusively parallel with the turning axle direction, the magnetic flux with alternate of certain frequency can occur in the Helmholtz coils of laterally putting 12,12:
Wherein, mp is the magnetic moment component on the opposite way round; K is a coil constant; ω is an angular velocity.
Produce electric current thus in coil, electric current in the coil causes the variation of multimeter displayed value, and this will produce can be by an induced voltage Ueff of alternating current voltmeter measurement:
If the direction of magnetic moment m and turning axle deviation in driction angle are α, magnetic moment component mp will be drawn by following formula: mp=sin α * m, wherein, m is total magnetic moment.For minimum angle, sin α ≈ 0.01745 α, α unit is " radian ".Thereby, Ueff=0.01234m α ω/k
Electric current in the coil 12,12 changes the variation that causes multimeter 15 displayed values.Because the rotation of initial drive link 10 exists acceleration to cause the displayed value instability of multimeter 15,3-4 such as palpus are after second, and ring magnet 100 constant speed have been rotated, and indicating value has tended towards stability, and notes the displayed value of multimeter 15 again.Thereby draw the ring axial charging Sintered NdFeB magnet degree of orientation in 100 finished product stages: α=k*Ueff/0.01234*m* ω
During measurement, what time followingly must note:
1, in normal operation, the temperature of power supply and engine bar may reach 35 degrees centigrade or more than.If this equipment uses in the higher temperature environment, join a heat dissipation equipment (as fan) for power supply and engine and be very important.
2, the tested annulus of each model necessarily has a jig that matches with its specification.And this jig must guarantee that tested annulus is positioned at the centre of turning axle.
3, keep equipment cleaning, guarantee that when measuring electromagnetic interference source is away from equipment.
Example:
Measuring specification is the degree of orientation of the axial charging annulus of D18-d13.3-3
In this device, the rotational speed of engine bar 10 is 3500 rev/mins, thereby the frequency of induced voltage is 58.3Hz, and ω=366.5rad/s, Helmholtz coils constant are k=1.522*10
-4M.
With above numerical value substitution formula: Ueff=0.01234m α ω/k
Draw: Ueff=2.972*10
4* m* α/mV
The magnetic moment of this annulus 100 is 500*10
-9, misorientation will make voltage meter produce the value of reading of 14.86mV/ degree so.
According to above derivation, the voltage indicating value of multimeter 15 can be converted to the toroidal axial charging degree of orientation in 100 finished product stages of Sintered NdFeB magnet: α=Ueff/14.86
According to above disclosed content, those skilled in the art also may carry out such or such modification, replenish and replace the present invention, yet this all will be in protection scope of the present invention.
Claims (10)
1. the degree of orientation measurement mechanism of a ring axial charging permanent magnet is characterized in that, the degree of orientation measurement mechanism of this ring axial charging permanent magnet comprises:
Helmholtz coils, it is connected with a multimeter, the input/output terminal of this a multimeter capacitor in parallel;
One rotating disk, the drive link of this rotating disk be perpendicular to this rotating disk, and be positioned on the geometric center position of this Helmholtz coils, by the drive motor driven in rotation; And
The frock jig, it has the ring axial charging Sintered NdFeB magnet is fixed on the middle position of upper surface of this rotating disk and the Helmholtz coils position perpendicular to the geometric center position of this rotating disk direction.
2. the degree of orientation measurement mechanism of ring axial charging permanent magnet as claimed in claim 1 is characterized in that, described Helmholtz coils vertically is provided with, and described rotating disk along continuous straight runs is provided with.
3. the degree of orientation measurement mechanism of ring axial charging permanent magnet as claimed in claim 1 is characterized in that, also comprises heat abstractor.
4. the degree of orientation measurement mechanism of ring axial charging permanent magnet as claimed in claim 1 is characterized in that, the degree of orientation measurement mechanism of described ring axial charging permanent magnet further comprises A/D converter, computing machine and external unit thereof.
5. the degree of orientation measuring method of a ring axial charging permanent magnet is characterized in that, comprises the following steps:
Helmholtz coils is set, and it is connected with a multimeter, the input/output terminal of this a multimeter capacitor in parallel;
One rotating disk is set, and the drive link that makes this rotating disk is perpendicular to this rotating disk, and is positioned on the geometric center position of this Helmholtz coils;
Utilize the frock jig ring axial charging Sintered NdFeB magnet to be fixed on the middle position of upper surface of this rotating disk and Helmholtz coils geometric center position perpendicular to this rotating disk direction;
Open drive motor, make this rotating disk drive the rotation of ring axial charging Sintered NdFeB magnet;
After treating the rotation of ring magnet constant speed, write down or gather the inductive voltage value of this Helmholtz coils; And
Calculate the degree of orientation in toroidal axial charging Sintered NdFeB magnet finished product stage according to inductive voltage value.
6. the degree of orientation measuring method of ring axial charging permanent magnet as claimed in claim 5, it is characterized in that, the degree of orientation of ring axial charging permanent magnet represents that by direction and the turning axle deviation in driction angle [alpha] of magnetic moment m the conversion formula between this angle [alpha] and the inductive voltage value Ueff is:
α＝k＊Ueff/0.01234＊m＊ω
Wherein, k is a coil constant; ω is an angular velocity; M is total magnetic moment.
7. the degree of orientation measuring method of ring axial charging permanent magnet as claimed in claim 5 is characterized in that, described inductive voltage value is with the displayed value record of multimeter.
8. the degree of orientation measuring method of ring axial charging permanent magnet as claimed in claim 5 is characterized in that, described Helmholtz coils vertically is provided with, and described rotating disk is horizontally disposed with.
9. the degree of orientation measuring method of ring axial charging permanent magnet as claimed in claim 5 is characterized in that, heat abstractor also is set.
10. the degree of orientation measuring method of ring axial charging permanent magnet as claimed in claim 5, it is characterized in that, gather inductive voltage value and finish by computing machine according to the step that inductive voltage value calculates the degree of orientation in toroidal axial charging Sintered NdFeB magnet finished product stage.
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| CN101833074A (en) * | 2010-04-29 | 2010-09-15 | 苏州同心医疗器械有限公司 | Device and method thereof for measuring magnetization vector direction deflection angle of permanent magnet |
| CN102053232A (en) * | 2009-11-06 | 2011-05-11 | 三环瓦克华（北京）磁性器件有限公司 | Device and method for measuring magnet angle deviation |
| CN102411130A (en) * | 2011-12-09 | 2012-04-11 | 西南应用磁学研究所 | Device and method for measuring magnetic declination of permanent magnet |
| CN101846730B (en) * | 2009-03-24 | 2012-10-17 | 北京京磁强磁材料有限公司 | Method and device for detecting direction of easy magnetization of anisotropic permanent magnet |
| CN104483640A (en) * | 2014-12-18 | 2015-04-01 | 重庆吉力芸峰实业(集团)有限公司 | Device and method for automatically magnetizing and testing magnetic motor rotors |
| CN107490775A (en) * | 2017-09-30 | 2017-12-19 | 北京航空航天大学 | A kind of three axial coil constants and non-orthogonal angles integral measurement method |
| CN108226827A (en) * | 2017-12-14 | 2018-06-29 | 湖南省联众科技有限公司 | Permanent magnet magnetic declination angle measurement device and method |
| CN109541514A (en) * | 2018-12-28 | 2019-03-29 | 中国计量科学研究院 | A kind of magnetic moment measures the calibration control device and calibrating installation of small coil turn area |
| CN110764033A (en) * | 2019-11-18 | 2020-02-07 | 苏州大学 | Small-sized multifunctional three-dimensional magnetoelectric test system |
| CN110865319A (en) * | 2019-12-03 | 2020-03-06 | 东莞金坤新材料股份有限公司 | Device for judging magnetizing orientation direction of magnetic conduction piece |
| WO2023143172A1 (en) * | 2022-01-28 | 2023-08-03 | 上海安翰医疗技术有限公司 | Magnetic ball calibration method and magnetic ball calibration apparatus |
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| CN101846730B (en) * | 2009-03-24 | 2012-10-17 | 北京京磁强磁材料有限公司 | Method and device for detecting direction of easy magnetization of anisotropic permanent magnet |
| CN102053232A (en) * | 2009-11-06 | 2011-05-11 | 三环瓦克华（北京）磁性器件有限公司 | Device and method for measuring magnet angle deviation |
| CN101833074A (en) * | 2010-04-29 | 2010-09-15 | 苏州同心医疗器械有限公司 | Device and method thereof for measuring magnetization vector direction deflection angle of permanent magnet |
| CN101833074B (en) * | 2010-04-29 | 2012-11-07 | 苏州同心医疗器械有限公司 | Device and method thereof for measuring magnetization vector direction deflection angle of permanent magnet |
| CN102411130A (en) * | 2011-12-09 | 2012-04-11 | 西南应用磁学研究所 | Device and method for measuring magnetic declination of permanent magnet |
| CN102411130B (en) * | 2011-12-09 | 2013-08-07 | 西南应用磁学研究所 | Device and method for measuring magnetic declination of permanent magnet |
| CN104483640A (en) * | 2014-12-18 | 2015-04-01 | 重庆吉力芸峰实业(集团)有限公司 | Device and method for automatically magnetizing and testing magnetic motor rotors |
| CN104483640B (en) * | 2014-12-18 | 2017-03-08 | 重庆吉力芸峰实业(集团)有限公司 | Magneto rotor automatic magnetism-charging test device and its method for testing that magnetizes |
| CN107490775A (en) * | 2017-09-30 | 2017-12-19 | 北京航空航天大学 | A kind of three axial coil constants and non-orthogonal angles integral measurement method |
| CN107490775B (en) * | 2017-09-30 | 2020-01-21 | 北京航空航天大学 | Triaxial coil constant and non-orthogonal angle integrated measurement method |
| CN108226827A (en) * | 2017-12-14 | 2018-06-29 | 湖南省联众科技有限公司 | Permanent magnet magnetic declination angle measurement device and method |
| CN108226827B (en) * | 2017-12-14 | 2021-05-11 | 湖南省联众科技有限公司 | Permanent magnet magnetic declination angle measuring device and method |
| CN109541514A (en) * | 2018-12-28 | 2019-03-29 | 中国计量科学研究院 | A kind of magnetic moment measures the calibration control device and calibrating installation of small coil turn area |
| CN109541514B (en) * | 2018-12-28 | 2024-02-02 | 中国计量科学研究院 | Calibration control device and calibration device for small coil turn area for magnetic moment measurement |
| CN110764033A (en) * | 2019-11-18 | 2020-02-07 | 苏州大学 | Small-sized multifunctional three-dimensional magnetoelectric test system |
| CN110764033B (en) * | 2019-11-18 | 2022-06-14 | 苏州大学 | Small-sized multifunctional three-dimensional magnetoelectric test system |
| CN110865319A (en) * | 2019-12-03 | 2020-03-06 | 东莞金坤新材料股份有限公司 | Device for judging magnetizing orientation direction of magnetic conduction piece |
| WO2023143172A1 (en) * | 2022-01-28 | 2023-08-03 | 上海安翰医疗技术有限公司 | Magnetic ball calibration method and magnetic ball calibration apparatus |
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